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feat: support task auto manager by server role
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163
hugegraph-api/src/main/java/org/apache/hugegraph/core/RoleTypeDataAdapterImpl.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with this | ||
| * work for additional information regarding copyright ownership. The ASF | ||
| * licenses this file to You under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | ||
| * License for the specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
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| package org.apache.hugegraph.core; | ||
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| import java.util.ArrayList; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
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| import org.apache.hugegraph.HugeGraphParams; | ||
| import org.apache.hugegraph.auth.SchemaDefine; | ||
| import org.apache.hugegraph.backend.query.ConditionQuery; | ||
| import org.apache.hugegraph.backend.store.BackendEntry; | ||
| import org.apache.hugegraph.backend.tx.GraphTransaction; | ||
| import org.apache.hugegraph.election.RoleTypeData; | ||
| import org.apache.hugegraph.election.RoleTypeDataAdapter; | ||
| import org.apache.hugegraph.schema.VertexLabel; | ||
| import org.apache.hugegraph.structure.HugeVertex; | ||
| import org.apache.hugegraph.type.HugeType; | ||
| import org.apache.hugegraph.type.define.DataType; | ||
| import org.apache.hugegraph.type.define.HugeKeys; | ||
| import org.apache.tinkerpop.gremlin.structure.Graph; | ||
| import org.apache.tinkerpop.gremlin.structure.T; | ||
| import org.apache.tinkerpop.gremlin.structure.Vertex; | ||
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| public class RoleTypeDataAdapterImpl implements RoleTypeDataAdapter { | ||
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| private final HugeGraphParams graphParams; | ||
| private final Schema schema; | ||
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| public RoleTypeDataAdapterImpl(HugeGraphParams graphParams) { | ||
| this.graphParams = graphParams; | ||
| this.schema = new Schema(graphParams); | ||
| this.schema.initSchemaIfNeeded(); | ||
| } | ||
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| @Override | ||
| public boolean updateIfNodePresent(RoleTypeData stateData) { | ||
| // if epoch increase, update and return true | ||
| // if epoch equal, ignore different node, return false | ||
| try { | ||
| GraphTransaction tx = this.graphParams.systemTransaction(); | ||
| tx.doUpdateIfPresent(this.constructEntry(stateData)); | ||
| tx.commitOrRollback(); | ||
| } catch (Throwable ignore){ | ||
| return false; | ||
| } | ||
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| return true; | ||
| } | ||
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| BackendEntry constructEntry(RoleTypeData stateData) { | ||
| List<Object> list = new ArrayList<>(8); | ||
| list.add(P.LABEL); | ||
| list.add(P.ROLE_DATA); | ||
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| list.add(P.NODE); | ||
| list.add(stateData.node()); | ||
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| list.add(P.CLOCK); | ||
| list.add(stateData.clock()); | ||
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| list.add(P.EPOCH); | ||
| list.add(stateData.epoch()); | ||
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| list.add(P.TYPE); | ||
| list.add("default"); | ||
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| HugeVertex vertex = this.graphParams.systemTransaction() | ||
| .constructVertex(false, list); | ||
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| return this.graphParams.serializer().writeVertex(vertex); | ||
| } | ||
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| @Override | ||
| public Optional<RoleTypeData> query() { | ||
| GraphTransaction tx = this.graphParams.systemTransaction(); | ||
| ConditionQuery query = new ConditionQuery(HugeType.VERTEX); | ||
| VertexLabel vl = this.graphParams.graph().vertexLabel(P.ROLE_DATA); | ||
| query.eq(HugeKeys.LABEL, vl.id()); | ||
| query.eq(HugeKeys.PROPERTY_KEY, "default"); | ||
| query.showHidden(true); | ||
| Iterator<Vertex> vertexIterator = tx.queryVertices(query); | ||
| if (vertexIterator.hasNext()) { | ||
| Vertex next = vertexIterator.next(); | ||
| String node = (String) next.property(P.NODE).value(); | ||
| Long clock = (Long) next.property(P.CLOCK).value(); | ||
| Integer epoch = (Integer) next.property(P.EPOCH).value(); | ||
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| RoleTypeData roleTypeData = new RoleTypeData(node, epoch, clock); | ||
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| return Optional.of(roleTypeData); | ||
| } | ||
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| return Optional.empty(); | ||
| } | ||
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| public static final class P { | ||
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| public static final String ROLE_DATA = Graph.Hidden.hide("role_data"); | ||
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| public static final String LABEL = T.label.getAccessor(); | ||
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| public static final String NODE = Graph.Hidden.hide("role_node"); | ||
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| public static final String CLOCK = Graph.Hidden.hide("role_clock"); | ||
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| public static final String EPOCH = Graph.Hidden.hide("role_epoch"); | ||
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| public static final String TYPE = Graph.Hidden.hide("role_type"); | ||
| } | ||
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| public static final class Schema extends SchemaDefine { | ||
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| public Schema(HugeGraphParams graph) { | ||
| super(graph, P.ROLE_DATA); | ||
| } | ||
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| @Override | ||
| public void initSchemaIfNeeded() { | ||
| if (this.existVertexLabel(this.label)) { | ||
| return; | ||
| } | ||
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| String[] properties = this.initProperties(); | ||
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| VertexLabel label = this.schema().vertexLabel(this.label) | ||
| .enableLabelIndex(true) | ||
| .usePrimaryKeyId() | ||
| .primaryKeys(P.TYPE) | ||
| .properties(properties) | ||
| .build(); | ||
| this.graph.schemaTransaction().addVertexLabel(label); | ||
| } | ||
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| private String[] initProperties() { | ||
| List<String> props = new ArrayList<>(); | ||
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| props.add(createPropertyKey(P.NODE, DataType.TEXT)); | ||
| props.add(createPropertyKey(P.CLOCK, DataType.LONG)); | ||
| props.add(createPropertyKey(P.EPOCH, DataType.INT)); | ||
| props.add(createPropertyKey(P.TYPE, DataType.TEXT)); | ||
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| return super.initProperties(props); | ||
| } | ||
| } | ||
| } |
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